Carrabiitol ® , a Novel Oligosaccharide Polyol Composition, Mitigates the Impact of Flooding, Drought, Salinity, and High Temperature in Tomato.

Simple Summary: The present research work aimed to study the influence of Carrabiitol®, an oligosaccharide polyol composition, in alleviating the adverse impact of various abiotic stresses in tomato (Solanum lycopersicum L.) plants. Experiments included raising tomato plants treated with different dosages of Carrabiitol® and studying their growth and physiological and biochemical parameters on exposure to abiotic stresses, namely salinity, flooding, drought, and high temperatures. It was observed that plants that were raised from pre-treated seeds or those given booster dosages at the 2–3 leaf stage or at the flowering stage were more resistant to the adverse effects of the abiotic stresses. It can be concluded that the Carraiitol® formulation influences the growth, physiological, and biochemical parameters of tomato plants grown under stress conditions. The formulation can serve as an effective, sustainable, and eco-friendly biostimulant for plant growth and productivity and is very relevant in the present scenario of climate change. Abiotic stress results in various physiological and biochemical changes in plants. Osmolytes play a pivotal role in improving the tolerance to abiotic stress in plants. This study evaluated the effectiveness of a commercial formulation, Carrabiitol®, an oligosaccharide polyol composition, in alleviating adverse impacts of abiotic stress in tomato (Solanum lycopersicum L. var. Arka Rakshak) plants. Plants were raised from seed and treated with 1 mL/L, 2 mL/L, and 3 mL/L of Carrabiitol®. The foliage of developing plants was treated at the 2–3 leaf stage (T2, T3, and T4) and at pre-flowering stage (T5, T6, and T7). Growth conditions were compared with those of plants developed from untreated seed (T1). Developing tomato plants were then exposed to flooding, salinity (50 mM NaCl), high temperature (41.1 °C), or drought at the flowering stage. Plants were evaluated for their dry weight, leaf water potential, stomatal conductance, transpiration rate, antioxidant potential, chlorophyll, carotenoid, glucose, sucrose, malondialdehyde, and proline contents. Pre-treated seed, which received a booster treatment at the 2–3 leaf stage (T4 = seed treatment and booster at the 2–3 leaf stage with 3 mL/L Carrabiitol®) and pre-flowering stages (T5, T6, and T7 = seed treatment and booster doses at the pre-flowering stage with 1, 2, and 3 mL/L Carrabiitol®, respectively), was effective in mitigating negative impacts on various growth parameters of stressed tomato plants (p < 0.05). Carrabiitol® may be an effective, sustainable, and bio-rational organic osmolyte formulation for reducing the effects of abiotic stress on plant growth and productivity. [ABSTRACT FROM AUTHOR]